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New Castle County, Delaware

Licensed Septic Companies in New Castle County, DE

19 septic companies serve New Castle County, Delaware, and 17 of them hold a Delaware septic license or certification matched to the Delaware Department of Natural Resources and Environmental Control list (data as of October 2026).

Septic services in New Castle County

Guides: Septic tank pumping · Septic system installation · Septic inspection · Septic repair · Installation cost · Pumping cost

19 septic companies in New Castle County

Middletown 6

  • Mark North Builders, LLC

    Middletown, DE 19709

    • Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #4433E3 (Delaware Department of Natural Resources and Environmental Control, verify)

    Per state license: Installation

    (302) 530-3620

  • Morgan Creek GC LLC

    Middletown, DE 19709

    • Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #4602E3 (Delaware Department of Natural Resources and Environmental Control, verify)

    Per state license: Installation

    (302) 275-3128

  • Richard F Matoni General Contractor

    Middletown, DE 19709

    • Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #4072E3 (Delaware Department of Natural Resources and Environmental Control, verify)

    Per state license: Installation

    (302) 598-4975

  • Sterling Cabinetry & Carpentry

    Middletown, DE 19709

    • Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #2351E3 (Delaware Department of Natural Resources and Environmental Control, verify)

    Per state license: Installation

    (302) 367-4311

  • Town of Middletown

    Middletown, DE 19709

    • Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #6136E2 (Delaware Department of Natural Resources and Environmental Control, verify)
    • Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #6136E4 (Delaware Department of Natural Resources and Environmental Control, verify)

    Per state license: Installation

    (302) 378-2711 middletownde.org

  • W W Snyder Masonary Excavating

    Middletown, DE 19709

    • Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #2344E3 (Delaware Department of Natural Resources and Environmental Control, verify)

    Per state license: Installation

    (302) 598-1711

Newark 4

  • Artesian Resources

    Newark, DE 19702

    • Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #2334E4 (Delaware Department of Natural Resources and Environmental Control, verify)
    • Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #2334E3 (Delaware Department of Natural Resources and Environmental Control, verify)

    Per state license: Installation

    (302) 250-8364

  • Blevins Excavating

    Newark, DE 19702

    • Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #2018E3 (Delaware Department of Natural Resources and Environmental Control, verify)

    Per state license: Installation

    (302) 233-2411

  • Robert Wiesner Plumbing

    Newark, DE 19702

    • Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #2394E3 (Delaware Department of Natural Resources and Environmental Control, verify)

    Per state license: Installation

    (302) 368-7766

  • W F Construction Incorporated

    Newark, DE 19714

    • Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #4462E3 (Delaware Department of Natural Resources and Environmental Control, verify)

    Per state license: Installation

    (302) 456-9245

Bear 2

  • D S Wilson

    Bear, DE 19701

    • Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #2400E3 (Delaware Department of Natural Resources and Environmental Control, verify)

    Per state license: Installation

    (302) 354-2779

  • Robert C Peoples

    2750 Wrangle Hill Rd, Bear, DE 19701

    • Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #2264E3 (Delaware Department of Natural Resources and Environmental Control, verify)
    • Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #2263E3 (Delaware Department of Natural Resources and Environmental Control, verify)

    Per state license: Installation

    (302) 836-1500 rcpeoples.com

Hockessin 2

  • David P Roser

    Hockessin, DE 19707

    • Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #6242E1 (Delaware Department of Natural Resources and Environmental Control, verify)

    Per state license: Installation

    (302) 218-3388

  • R Webb Excavating LLC

    Hockessin, DE 19707

    • Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #2387E3 (Delaware Department of Natural Resources and Environmental Control, verify)

    Per state license: Installation

    (302) 234-2534

Townsend 2

  • Green Paving & Excavating

    Townsend, DE 19734

    • Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #2120E3 (Delaware Department of Natural Resources and Environmental Control, verify)

    Per state license: Installation

    (302) 378-2965

  • Jeff Bartsch Trucking And Excavating Incorporated

    Townsend, DE 19734

    • Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #2010E3 (Delaware Department of Natural Resources and Environmental Control, verify)

    Per state license: Installation

    (302) 653-9329

Wilmington 2

Yorklyn 1

  • Webbys Septic Services LLC

    Yorklyn, DE 19736

    • Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #4378E3 (Delaware Department of Natural Resources and Environmental Control, verify)

    Per state license: Installation

    (302) 547-8789

Septic licensing in Delaware

Delaware publishes its Class E septic contractor roster as public-domain open data, including company phone and email. The Delaware DNREC issues these credentials: Class E system contractor/installer license.

Permits for new systems, replacements and most repairs are issued locally. Ask the contractor which office handles New Castle County and whether the permit fee is in their quote.

Delaware septic licensing: agencies, license types and how to check a license →

Septic companies in New Castle County: common questions

How many licensed septic companies are in New Castle County, DE?

19 septic companies serve New Castle County, Delaware, and 17 of them hold a Delaware septic license or certification matched to the Delaware Department of Natural Resources and Environmental Control list (data as of October 2026). Each license badge on this page names the agency and links to its lookup so you can confirm it.

Who licenses septic contractors in Delaware?

Delaware publishes its Class E septic contractor roster as public-domain open data, including company phone and email. The licensing body is the Delaware DNREC.

Which companies pump septic tanks in New Castle County?

1 of the 19 listings in New Castle County offer septic tank pumping, either on their own website or under a state pumper license. Use the service filter above to show only those companies.

Which companies install septic systems in New Castle County?

18 listings in New Castle County install septic systems. New systems and replacements need a permit, so ask each installer to handle the permit and to show their Delaware license.

How do I check a septic contractor's license in Delaware?

Use the Delaware DNREC's lookup (https://data.delaware.gov/resource/376h-4rq3) and search the contractor's name or license number. Our guide to checking a septic license walks through it.